TRK-MPC5604P ADC

We are working on a new development project based on MPC5604P MCU. We are using TRK-MPC5604P Evaluation board developed by P&E Microcomputer Systems. I'm trying to run the example code provided in Freescale Application Note AN2865: (Section 22 ADC: Software Trigger, Continuous Scan) to experiment with the ADC functions. It is already the third day that I'm trying however, no matter what I did the ADC refuses to run. The conversion starts but never completes. I was wondering whether anybody had already used that example code given in the AN2865 and can help me finding what is wrong.